static ssize_t w1_f12_read_state(
struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr,
char *buf, loff_t off, size_t count)
{
u8 w1_buf[6]={W1_F12_FUNC_READ_STATUS, 7, 0, 0, 0, 0};
struct w1_slave *sl = kobj_to_w1_slave(kobj);
u16 crc=0;
int i;
ssize_t rtnval=1;
if (off != 0)
return 0;
if (!buf)
return -EINVAL;
mutex_lock(&sl->master->bus_mutex);
if (w1_reset_select_slave(sl)) {
mutex_unlock(&sl->master->bus_mutex);
return -EIO;
}
w1_write_block(sl->master, w1_buf, 3);
w1_read_block(sl->master, w1_buf+3, 3);
for (i=0; i<6; i++)
crc=crc16_byte(crc, w1_buf[i]);
if (crc==0xb001) /* good read? */
*buf=((w1_buf[3]>>5)&3)|0x30;
else
/**
* Compute the CRC-16 for the data buffer
*
* @param crc previous CRC value
* @param buffer data pointer
* @param len number of bytes in the buffer
* @return the updated CRC value
*/
crc16_t crc16(crc16_t crc, const void *buffer, unsigned int len)
{
const unsigned char *cp = buffer;
while (len--)
crc = crc16_byte(crc, *cp++);
return crc;
}
/**
* Compute the CRC-16 for the data buffer
*
* @param crc previous CRC value
* @param buffer data pointer
* @param len number of bytes in the buffer
* @return the updated CRC value
*/
Uint16 crc16(const char * buffer, size_t len, Uint16 crc )
{
while (len--)
{
crc = crc16_byte(crc, (Uint8)*buffer);
++buffer;
}
return crc;
}
/**
* crc16 - compute the CRC-16 for the data buffer
* @crc: previous CRC value
* @buffer: data pointer
* @len: number of bytes in the buffer
*
* Returns the updated CRC value.
*/
uint16_t bd_crc16(uint16_t crc, uint8_t const *buffer, uint16_t len)
{
while (len--)
crc = crc16_byte(crc, *buffer++);
return crc;
}
/**
* crc16 - compute the CRC-16 for the data buffer
* @crc: previous CRC value
* @buffer: data pointer
* @len: number of bytes in the buffer
*
* Returns the updated CRC value.
*/
u16 crc16(u16 crc, u8 const *buffer, size_t len)
{
while (len--)
crc = crc16_byte(crc, *buffer++);
return crc;
}
/**
* crc16 - compute the CRC-16 for the data buffer
* @crc: previous CRC value
* @buffer: data pointer
* @len: number of bytes in the buffer
*
* Returns the updated CRC value.
*/
uint16 crc16(uint16 crc, uint8 const *buffer, uint32 len)
{
while(len--)
crc = crc16_byte(crc, *buffer++);
return crc;
}
/**
* crc16 - compute the CRC-16 for the data buffer
* @crc: previous CRC value
* @buffer: data pointer
* @len: number of bytes in the buffer
*
* Returns the updated CRC value.
*/
R_API ut16 r_hash_crc16(ut16 crc, ut8 const *buffer, ut64 len) {
while (len--) {
crc = crc16_byte (crc, *buffer++);
}
return r_read_le16 (&crc);
}
/**
* crc16 - compute the CRC-16 for the data buffer
* @crc: previous CRC value
* @buffer: data pointer
* @len: number of bytes in the buffer
*
* Returns the updated CRC value.
*/
unsigned short crc16(unsigned short crc, unsigned char const *buffer, size_t len)
{
while (len--)
crc = crc16_byte(crc, *buffer++);
return crc;
}
/*
* crc16 - compute the CRC-16 for the data buffer
* @crc: previous CRC value
* @buffer: data pointer
* @len: number of bytes in the buffer
*
* Returns the updated CRC value.
*/
unsigned short crc16(unsigned short crc, unsigned char *buffer, unsigned int len) {
while(len--) {
crc = crc16_byte(crc, *buffer++);
}
return crc;
}
static u16 crc16(u16 crc, u8 const *buffer, u32 len)
{
while (len--)
crc = crc16_byte(crc, *buffer++);
return crc;
}
